I usually do natural light portraits but am going to start shooting bands inside on a white backdrop. I think I will have two 300w mono lights to light the backdrop and a main 600w light for the band. I seen others use large octaboxes as a modifier on their main light but this was only for a couple people. I am wondering if I should get this or not. Would a large umbrella work just as well?
This would work perfectly for what you have in mind. I have done some very similar work with it. You will have to be aware of some shadows that you can control with either reflectors or secondary directional lighting, but this thing throws huge soft light that will cover almost any size group.